// Entity Framework Plus

// Doc: https://entityframework-plus.net/batch-update

​

// @nuget: Microsoft.EntityFrameworkCore.SqlServer

// @nuget: Z.EntityFramework.Plus.EFCore

​

using System;

using System.Linq;

using Microsoft.EntityFrameworkCore;

using System.Collections.Generic;

using Microsoft.Data.SqlClient;

using Z.EntityFramework.Plus;

​

public class Program

{

    public static void Main()

    {

        using (var context = new EntityContext())

        {

            context.Database.EnsureCreated();

        }

        GenerateData();

        // Update: UPDATE all rows from the database using a LINQ Query without loading entities in the context.

        using (var context = new EntityContext())

        {

            // UPDATE all customers that are inactive for more than two years

            var date = DateTime.Now.AddYears(-2);

            context.Customers

                .Where(x => x.IsActive && x.LastLogin < date)

                .Update(x => new Customer {IsActive = false, Description = "Updated"});

            FiddleHelper.WriteTable(context.Customers.ToList());    

        }

        // UpdateFromQuery: UPDATE all rows from the database using a LINQ Query without loading entities in the context.

        using (var context = new EntityContext())

        {

            // UPDATE customers by Name

            context.Customers.Where(x => x.Name == "Customer_C").Update(x => new Customer {Description = "Updated_C",IsActive = false});

            FiddleHelper.WriteTable(context.Customers.ToList());

        }

    }

    public static void GenerateData()

    {

        using (var context = new EntityContext())

        {

            context.Customers.Add(new Customer() { Name ="Customer_A", Description = "Description", IsActive = true, LastLogin = new DateTime(2010,1,1) });

            context.Customers.Add(new Customer() { Name ="Customer_B", Description = "Description", IsActive = true, LastLogin = new DateTime(2010,1,1) });         

            context.Customers.Add(new Customer() { Name ="Customer_C", Description = "Description", IsActive = true, LastLogin = DateTime.Now });

            context.SaveChanges();  

        }

        using (var context = new EntityContext())

        {

            FiddleHelper.WriteTable(context.Customers.ToList());    

        }

    }

​

    public class EntityContext : DbContext

    {

        public EntityContext() 

        {

        }

​

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)

        {

            optionsBuilder.UseSqlServer(new SqlConnection(FiddleHelper.GetConnectionStringSqlServer()));

​

            base.OnConfiguring(optionsBuilder);

        }

        public DbSet<Customer> Customers { get; set; }

    }

    public class Customer

    {

        public int CustomerID { get; set; }

        public string Name { get; set; }

        public string Description { get; set; }

        public DateTime LastLogin { get; set; }

        public Boolean IsActive { get; set; }

    }

}